Metal C-shaped ring gasket

Abstract

A metal C-shaped ring gasket is constructed so that a satisfactory sealing property can be obtained even with a low clamping pressure. The metal C-shaped ring gasket is made of an austenite stainless steel and constructed so as to have a superficial roughness below 0.2 mum Ra and a superficial hardness below 230 Hv by electrolytic polishing.

What is claimed is:  
     
       1. A crescent-shaped metal ring gasket comprising an austenite stainless steel and having an inner surface and an outer surface, an outward projecting cross-section of said gasket defining the crescent-shape, a central plane on the inner surface of the ring gasket dividing said gasket into symmetric portions, a central axis perpendicular to the central plane and equidistant from the inner surface of said gasket, the ring gasket having a first smallest diameter relative to the central axis at the central plane, outwardly spaced edges on the inner surface of said gasket extending about the circumference of the gasket having a second diameter relative to said central axis greater than the first diameter, the thickness of said gasket between the inner and outer surfaces thereof being maximum at the central plane and decreasing at positions outwardly therefrom and finishing at the spaced edges of the crescent-shaped gasket, and said ring gasket having a superficial roughness below 0.2 μm Ra and a superficial hardness below 230 Hv. 
     
     
       2. The metal ring gasket according to  claim 1 , wherein said ring gasket comprises a monolithic element. 
     
     
       3. The metal ring gasket according to  claim 1 , wherein said ring gasket is free from coil springs.